/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Checks if the given function is a part of an interface on this blueprint
True if the given function is implemented as part of an interface
static bool IsInterfaceFunction ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, [UFunction](API\Runtime\CoreUObject\UObject\UFunction) * Function )